Mixer



A. T. JOLMA Feb. 23, 1937.

MIXER Filed Nov. 18, 1935 Patented Feb. 23, 1937 auntie UNITED STATES PATENT OFFEE MIXER Arnet Theodore Jolma, St. Helens, Oreg. Application November 18, 1935, Serial No. 50,441

2 Claims.

This invention relates to an improved mixer by means of which coloring matter may be mixed with nucoa, oleomargarin and other greasy or plastic substances which are manufactured in an o uncolored state and are sold together with a coloring substance to be mixed therewith by the purchaser before being used. It will be obvious that while the device is primarily intended for mixing coloring matter with a greasy or plastic sub- 'stance, the device may be used for mixing any substance of a similar texture which should be thoroughly mixed before being used.

' One object of the invention is to provide a de- A 25: throughout the mass of greasy or plastic substance.

Another object of the invention is to provide the device with a piston having means associated therewith for controlling movement of the greasy or plastic material through the piston according to the direction in which the piston is moving.

The invention is illustrated in the accompanying drawing, wherein Figure 1 is a view showing the improved mixer secured upon a table or other support and shown partially in side elevation and partially in 1ongitudinal section.

Figure 2 is a sectional view taken transversely through the housing of the mixer along the line 2-2 of Figure 1.

Figure 3 is a fragmentary longitudinal sectional view taken along the line 3-3 of Figure 2.

This mixer has a base I in the form of an elongated strip of wood, metal, porcelain or any other desired material, and upon one end portion of the base is mounted a housing 2 which may also be formed of any desired material and secured to the base in any manner desired. The housing preferably corresponds in width to the base and is rectangular in cross section, as shown in Figure 2, and of appreciably greater length than width. A clamp 3 is secured against a side edge face of the base in spaced relation to the inner or rear end of the housing and extends in depending relation to the base so that when the mixer is set in place upon a table 4 and the set screw 5 of the clamp tightened, to engage the under face of the table top, the mixer will be securely but detachably held firmly in place upon the table. The housing has an open outer or forward end so that a print of oleomargarin or other greasy or plastic material may be thrust into the housing and the open end of the housing then closed by a removable front wall or head 6 which fits against for- Ward ends of walls of the housing with a portion fitting snugly in the housing, as shown in Figure 1. A plate "I, of metal extends transversely across the outer faceof the head 6 and has its end portions formed with openings or slots to receive securing bolts 8 and referring to Figures 1 and 3 it will be seen that these bolts have their rear ends formed with eyes 9 loosely engaged about studs or pins l projecting from side walls of the housing. The forward end portions of the bolts are threaded toreceive winged nuts Hand it will be readily understood that when the bolts are engaged through the plate i and the nuts tightened, the head 6 will be firmly secured in closing relation to the open forward end of the housing. Therefore, when a print of oleomargarin or the like is placed in the housing, together with coloring matter and the head set in place andsecured, there will be no danger of the material escaping during the mixing operation.

A piston l2 which conforms to the interior dimensions of the housing is slidably received therein and at its center is formed with a threaded opening l3 to receive the reduced and threaded forward end M of a piston rod or bar I which extends longitudinally of the housing through an opening I6 formed in the rear or inner end wall of the housing. This rod'or bar is rectangular in cross section and has its outer or rear end portion formed with teeth to provide a rack l1 engaged by a gear or pinion is which is rotatably mounted between the arms H! of a bracket 2!! and provided with a handle 2| by means of which the pinion may be rotated and reciprocating movement imparted to the shaft l5 and piston 52. The bracket is secured upon the base I by screws or bolts 2| and its arms not only rotatably support the pinion H! but also carry a pinion or shaft 22 upon which a roller 23 is mounted. This roller is disposed under the bar or piston rod [5 to serve as a support for the outer portion thereof and permit the bar to slide easily. It will be understood that the rack will be of sufiicient length to permit the piston to travel the entire length of the housing from the open front or outer end v thereof to its closed rear or inner end and thus with the plates 7 so that the head 6 eliminate likelihood of the greasy or plastic material accumulating in the inner end portion of the housing and also permitting the material to be completely ejected, through the forward end of the housing after the mixing operation has been completed and the head 6 removed.

During operation of the mixer, the greasy or plastic material is to move through the piston as the piston reciprocates in thehousing and, therefore, the piston has been formed with openings and 25 located in spaced relation to opposite sides of the shaft or piston rod. Plates 26 and 21 are pivotally mounted in the openings 24 and 25 upon pins 28 and 29 extending vertically therein and by referring to Figure 3 it will be seen that the pin 28 is located adjacent the rear end of the opening 24, whereas the pin 28 is located adja-' cent the forward end of the opening 25. Therefore, the plate 28 extends forwardly from the pin 28 and the plate 2'! extends through the opening 25 rearwardly from the pin 29. The 'free end portions of the two plates are beveled, as shown at Stand 3! and, therefore, when the piston is in motion and traveling forwardly, the beveled surface 3il of the plate 26 will cause a'cam action to take place and swing this plate transversely across the opening 24 shown in Figure 3 to a position in which it partially blocks the opening, whereas the plate 22' will extend'in centered relation to the opening 25 and permit the greasy or plastic material to pass through the opening .25 at opposite sides of the plate 21. As the piston moves rearwardly, the plate 27 will be swung into position to partially block the opening Ziand the plate 25 disposed in centered relation to the opening 24. It will thus be seen that during reciprocating movement of the piston, the plastic material may move through one of its openings with greater case than it does through the other opening andthe plastic material will be circulated in the housing and the coloring matter thoroughly intermingled with the plastic material. After the coloring matter has been thoroughly intermingled with the greasy or plastic mass, the nuts I I may be loosened and the bolts 8 moved out of engagement may be removed and additional reciprocating movement imparted to the piston and thus cause the greasy or plastic material to be ejected from the open forward end of the housing. The clamp holding the mixer upon the table can then be loosened and the mixer thoroughly cleaned and put away until again needed.

Having thus described the invention, What is claimed as new is:

l. A mixing device comprising an elongated casing, a piston slidable longitudinally in said casing and having a piston rod extending through one end of the casing, said piston having openings formed therein whereby material in the cas ing may pass through the piston as the piston moves longitudinally in the casing during a mixing operation, plates pivotally mounted in the openings of the piston and extending longitudinally or" the casing with the plate in one opening having its free end extending longitudinally of th casing in an opposite direction to "the free end of the plate in a second opening, the free end portions of the plates being provided with cam surfaces whereby as the piston moves longitudinally one of the plates will be moved transversely into position-to retard movement of material through an opening .of the piston, and means for imparting reciprocating movement to the piston rod and piston. V

2. A mixing device comprising a base, an elongated casing carried by the base and extending longitudinally thereof with its inner end spaced from one end of the base, a piston slidable longitudinally in said casing and formed with openings for passage of material through the piston as the piston reciprocates in the casing, a rod extending from said piston through the inner end of the casing, a bracket, carried by the base in spaced relation to the inner end of the casing, a-roller carried by said bracket with: said rod resting thereon to support the outer end portion of the red, the upper portion of the rod being provided with rack teeth, a pinion carried :by said bracket over the rod and meshing with the rack teeth, and means for rotating the pinion and imparting reciprocating movement to the rod and piston.

ARNET THEODORE J OLMA. 

